Can't access AV Channel on Sony KV-C27TD

If the TV has no RCA inputs, then there is no "AV channel" option for it on any remote, just channel selection.

The purpose of a RCA to SCART converter (aka RF modulator) is to convert one of your channels to an A/V input. They operate (standard) on either channel 3 or 4 as selected by a switch on the converter.

If your converter is unpowered, it's entirely possible that the signal coming out is not good enough to overpower your antenna signal. In this case, you may need a powered unit (such as this one http://www.bestbuy.com/site/olspage.jsp?skuId=5806345&productCategoryId=abcat0107025&type=product&tab=7&id=1067388827858#productdetail) which can actively "shut off" the antenna input when signal is received from the auxiliary device.

Moryath:
Actually, SCART is a european av connector, which on it's 21 pins can carry RGB, Y-Pb-Pr, composite and S-Video systems through it, and control signals that can turn some equipment on and off, and switch aspect ratio modes (various voltages on pin 8 perform this function), it is up to the manufacturer which pins to actually connect internally and most small tvs only use the composite video, and left and right audio pins.

What switch2k7 has takes the video plug of the composite cable, and maps it to pin 20 (pin 18 earth), and left/right audio plugs to pins 2 and 6 (pin 4 shared earth)

An RF modulator is a completely different bird, but had this been what switch2k7 had been talking about your advice would be correct.

http://en.wikipedia.org/wiki/SCART

switch2k7: It may be your universal remote not knowing the right code for the av channel, proper replacement remotes can be ordered online.

http://www.avukltd.com/remotecontrolsearch.php?item_id=538163&action=send_details

I'm sure with your question being there so long you probably don't care anymore, but there could be someone else out there who needs the info.